Type-writing machine.



No. 844,532. PATENTED FEB. 19, 1907.

- J. F. MQELHINNY.

TYPE WRITING MACHINE. APPLICATION FILED NOV.21. 1905.

2 SHEETS-SHBBT 1.

- (Juvenl'oz wi m-e-me-o V PATENTED FEB. 19, 1907.

J. F. MOELHINNY. TYPE WRITING MACHINE.

APPLIGATION FILED NOV. 21, 1905.

2 SHEETS-SHEET 2.

attain,

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UNITED STATES PATENT OFFICE.

JAMES F. McELI IINNY, OF. EVANSVILLE, INDIANA, ASSIGNOR OF ONE-HALF ToJOHN n. FENDRICH, OF'EVANSVILLE, INDIANA.

TYPE-WRITING MACHINE.

Specification of Letters Patent.

Patented Eeb. 19, 1907.

Application filed November 21,1905. .Serial No. 288,441. 7

To all whom it may concern.-

. Be it known that I, JAMES F. MeELH'INNY, a citizen of the UnitedStates, residingat Evansville, in the county of Vanderburg and State .ofIndiana, have invented a new and useful Type-Writing Machine, of whichthe following is a specificati n.

This invention relates more particularly to means for controlling themovement of the paper-carriage of a type-writing machine.

The principal object is to provide simple means. of a novel naturewhereby'the car riage may be moved backwardly step bystep a. singlespace at the time, so that changesand corrections may be -made withgreater ease and expedition than with the ordinary. carriagenowin'common use,wl1ich the operator has to grasp and manually returntothe desired position, requiring considerable care plan view of aportion of said machine,'showing the back-spacing mechanism; Fig. 6 is adetail sectional view on the line -6 6 of Fig; 5.

Similar reference-numerals designate corresponding parts in all thefigures of the drawings.

In the present embodiment of the invention a portion of the-usual frameof a wellknown machine is shown and is designated 4, said frame havingmounted thereon the usual. paper-carriage 5. The letter-spacingmechanism of this carriage includes a rack 6, which is engaged withapinion 7 on a shaft 8 -journaled on the frame and extending totherear'side thereof. The usual Wheel 9, with whichiletter spacing dogscooperate, is securedto the rear-end of the shaft. So far as thusdescribed the parts are well known.

Directly inrear of the wheel 9 and secured to the shaft 8 isaratchet-whe'el 10, and fulcrumed between its nds on one endof the frameis a lever 11, the fulcrum and mountingwforsaid lever-being shown at 12.The

front end of the lever. is preferably flattened to provide amanually-engaged portion-13,

andxto "the rear end is pivoted a draft-rod,

comprising sections 14, conn'ected'by'a turnbuckle 15. The draft-rodrecinrocates in bearings '16, located on. the rear-jot the -.ma-

chine, and pivoted'to the rear endof -this draft-rod is a dog or'pawl:1:2, the, tooth-18 ofwhichyis arrangedto cooperate, withtheratchet-wheel 10. The said dog is normally heldout of engagement Withthe ratchetwheel bymeans of 'a stop-pin.19,acarried by a suitablepqrtionoflthe frame, which pin. en'- gages anupstanding lug 20, carriedby the dog. .A spring'21, interposed betweenthe' front portion of thelever and the frame, serves to throw the hand-engaged ,portionoutwardly,'and thus maintainst'he dog 17 out of engagement withtheratohet-Wheel.

It will be apparent that as the dog-is out of the path ..of movement, ofthe ratchet- .75 wheel under ordinary conditions the shaft? i. may berevolved'as usual, and thus permit the 'letterspacing movement of thecarriage.

however, itis desired to return. the carriage one or more spaces. as,for instance, in mak ing a correction theoperatorhas only to press thehandle portion 13 of the lever-toward the frame. This willcause' the dogto be moved in an opposite'directi'on or, in other words, away from thestop-pin 19, whereupon;

said dog will .drop intoengagement'with the wheel and move the sameoneincrement, or,

in other words, a single letterespace.' A tapetition of theoperation'will' cause another corresponding movement. It will thus beseen that simple means are provided whereby a carriage may be easily andexpeditiously returne to any, pointdesired, and the necessityfor-grasping the same and carefully adjusting itisobviated. I,

-Another. and perhaps ipreferred,ernbodiment of the inventiongislustrated. in Figs. 4, 5, and 6. In thisforrn the machine-frame isdesignated 4 and has mounted thereon a ,"paper-carriage5, theletter-spacing mechanism of which includes arack 6, that is engaged witha' pinion 7* on a shaft18. The usual WheelB with which flatter-spacingdogs cooperate, is carried bjr thewear end of the shaft, and directly inrear of said wheel 9 and secured to the. shaft "8 is aratchetwheel 10*.Fulcrumed between its endsv on the end of.t he base of the frame 4 is alever.

ver 16 is loosely connected, as shown at.18'.

I '29, interposed between the front portion of the lower end of anupright lever 19*, fulcrumed between its ends to a suitable partofthemachine-frame, as shown at 20. A draftrod is pivoted to the upper end ofthe lever 19 and comprises sections 21?, connected by a turnbuckle 22.The draftrrod reciprocates ina bearing 23*, mounted on the rear of themachine, and pivoted to the inner end I ofthis draft-rod a dogor" awl24*, the 'tooth-2'5? of which is arrange to cooperate with theratchet-wheel 10 Said dog is normally' held out of engagement vwith theratchet-wheel by means of a stop 26*, that is in the form'of abracket,carried by the bearing 23 said stop engaging-an upstanding lug27?, carried by the dog aboveits pivotal connection 28 with thedraft-rod. A spring thelever 11 and the frame, serves to throw thehand-engagedportion l3 -outwardly, and

through the interposed lever mechanism said spring maintains the toothof the dog 24 out. of engagement with the ratchet-wheel.

J The operationof this. structure is substantiallythe same as thatalready described, for

- iii-W111 be apparent 'that if the handle portion ,l3 is pressed towardthe frame of the ma: chlinethe lug 27? of the dog will'be moved awayfrom the stop 26. ,Consequently said dog will drop into, engagementwiththe wheel and the wheel will bemoved one increment.

The advantage for this structureiis that the handle portion is disposedinconvenient re "lation to thefkeyboard, andthe connections between thesame and the dog'are entirely out of the way of the carriage and theasso-' ciated mechanism.

From the foregoing 'i constructlon, operation, and many advan tages ofthe herein-described invention will t. is thoughti'that the I beapparent to thoseskilled in the art without further description, and itwill be understood that various changes in the size, shape,

proportion, and minor details of construction may be resorted to withoutdeparting from the spirit or sacrificing any of the advantages of theinvention.

' Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is- I 1. In a type-writing machine, thecombinatip'n'with a frame, of a carriage movably mounted thereon, andmeans for effecting the backspacing'of the carriage, said means in-'eluding a-rotary ratchet -wheel associated with the carriage, areciprocatory dra'ftrod extending in a horizontal plane above the Wheel,means for. reciprocating the rod, adog pivoted on the portion of'the rodthat is adjacent to the ratchet-wheel and having a depending toothmovable-downwardly into engagement with saidwheel, said dog also havingan upstanding lug, and a'stationary stop arranged over the dog and inthe path of movement of, the lug to normally maintain "the tooth of saiddog out of engagement with the ratchet-wheel. 1

2. In a type-writing machine, the combination with aframe, of a carriagemovably mounted thereon, and means for effecting the back' spacing ofthecarriage, said means in eluding a toothed deviceassociatcd with thecarriage, a'reciprocatory draft-rod extending above the device, meansfor reciprocating the rod, a dog pivoted on the rod and having a toothcooperating with the tecth of the device, said dog also having anupstanding lug,

and a stop located over the dog and in the path of movement of the lugto normally maintain the tooth of said'dog out of engagement with thetoothed device.

In testimony that I claim the foregoingas "my own I have hereto aflixedmy signature in the presence of two witnesses.

JAMES F. MGELHINNY- Witnesses: i

' I. F. CAMPBELL,

E. G. MoCoRMAo

